<template>
    <div>
        <div class="search">
            <input v-model="keyword" class="search-input" type="text" placeholder="输入城市名或拼音">
        </div>
        <div class="search-content" ref="search" v-show="keyword">
            <ul>
                <li class="search-item border-bottom" v-for="item of list" :key="item.id"  @click="handleCityClick(item.name)">{{item.name}}</li>
                <li class="search-item border-bottom" v-show="hasNoData">没有找到匹配数据</li><!-- list.length为0时才显示-->
            </ul>
        </div>
    </div>
</template>

<script>
import Bscroll from 'better-scroll'
export default {
    name:'CitySearch',
    props:{
        cities:Object
    },
    data(){
        return{
            keyword:'',
            list:[],
            timer:null
        }
    },
    computed:{
        hasNoData(){
            return !this.list.length
        }
    },
    watch:{
        keyword(){
            if(this.timer){
                clearTimeout(this.timer)
            }
            if(!this.keyword){
                this.list = []
                return
            }
            this.timer = setTimeout(() => {
                const result = [];
                for(let i in this.cities){
                    this.cities[i].forEach((value) => {
                        if(value.spell.indexOf(this.keyword)>-1 ||
                           value.name.indexOf(this.keyword)>-1){
                               result.push(value)
                        }
                    });
                    
                }
                this.list = result
            },100)
        }
    },
    methods:{
        handleCityClick(city){
            //派发一个名字为changeCity的Actions，把city传过去
            this.$store.commit('cityChange',city)
            this.$router.push('/')
        }
    },
    mounted(){
        this.scroll = new Bscroll(this.$refs.search)
    }
}
</script>

<style lang="less" scoped>
    @import '~styles/varibles.less';
    .search{
        height: .72rem;
        padding: 0 .1rem;
        background: @bgcolor;
        .search-input{
            box-sizing: border-box;
            width: 100%;
            height: .62rem;
            line-height: .62rem;
            text-align: center;
            border-radius: .06rem;
            color: #666;
            padding: 0 .1rem;
        }
    }
    .search-content{
        overflow: hidden;
        position: absolute;
        top: 1.58rem;
        left: 0;
        right: 0;
        bottom: 0;
        z-index: 1;
        background: rgb(230, 227, 227);
        .search-item{
            line-height: .62rem;
            padding-left: .2rem;
            color: #666;
            background: #fff;
        }
    }
</style>
